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This research examines how sulfuric acid vapor concentration affects the rate at which new atmospheric particles form.

Dependence of nucleation rates on sulfuric acid vapor concentration in diverse atmospheric locations

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Randomized trial analyzes nucleation rates based on sulfuric acid vapor concentration, suggesting implications for climate models.

This research examines how sulfuric acid vapor concentration affects the rate at which new atmospheric particles form.
Analyzed twenty-one nucleation events from continental and marine atmospheric environments.
Tested a power law model describing formation rates of 1 nm particles: J 1 = K · [ H 2 SO 4 ] P.
Constrained the exponent P to 2 based on experimental data.
Determined that the prefactor K ranges from 10 −14 to 10 −11 cm 3 s −1 across different environments.
Confirmed that an exponent value of 2 indicates the critical cluster involves two sulfuric acid molecules.
Found existing nucleation theories predict significantly larger exponent values.

Kuang et al. (2008) studied this question.

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